Talk:KVM

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Revision as of 01:03, 7 November 2013 by Jstjohn (Talk | contribs) (Merge KVM article into QEMU: re)

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Merge KVM article into QEMU

Because the QEMU-KVM fork of QEMU has been deprecated/obsoleted as of QEMU 1.3 [1] (about 9 months ago as of this writing [2]) and QEMU is now on version 1.6, we should strongly consider merging the KVM article into the main article for QEMU. A separate article for the KVM fork made sense historically, but now that the fork has been merged upstream, we should just keep everything on one page.

Does anyone disagree?
-- Jstjohn (talk) 16:29, 16 September 2013 (UTC)

Good idea, I don't think anybody can disagree, as the main section of this article, KVM#How_to_use_KVM, already just links to QEMU ^^
If then somebody considers QEMU to have become too long, it should be discussed to split it in some other way.
-- Kynikos (talk) 01:06, 18 September 2013 (UTC)
The problems of KVM#Tips_and_tricks should be solved along the way, especially KVM#Live_snapshots which belongs to libvirt and not to QEMU. It should also be clearly stated which features are KVM-specific to avoid confusion.
-- Lahwaacz (talk) 10:44, 22 September 2013 (UTC)
I just merged KVM#Live_snapshots into libvirt.
-- Jstjohn (talk) 01:03, 7 November 2013 (UTC)

kvm user group

Access to /dev/kvm is granted via ACLs:

/usr/lib/udev/rules.d/70-uaccess.rules
...
SUBSYSTEM=="misc", KERNEL=="kvm", TAG+="uaccess"
...

so adding the user to kvm group should be deprecated. There are many references to this all around the wiki.

-- Lahwaacz (talk) 11:12, 22 September 2013 (UTC)

works with "AMD FX(tm)-8350 Eight-Core Processor" using 2013.11.01 64bit

Using arch linux release 2013.11.01 in 64bit mode... it boots fine. Following the wikis... this is basically the parameters I used

$ /usr/bin/qemu-system-x86_64 -boot d -m 1024 -hda '/home/user/path/to/storage' -cdrom '/path/to/archlinux-2013.11.01-dual.iso' -net nic,vlanx=0 -net user,vlan=0 -localtime -k en-gb -smp 8 -enable-kvm -cpu host &
  • I also booted gentoo minimal iso 20131010 in 64bit mode ( go to gentoo to find out more ) using the same parameter but different iso
$ /usr/bin/qemu-system-x86_64 -boot d -m 1024 -hda '/home/user/path/to/storage' -cdrom '/path/to/install-amd64-minimal-20131010.iso' -net nic,vlan=0 -net user,vlan=0 -localtime -k en-gb -smp 8 -enable-kvm -cpu host &
  • During livecd boot up... I see the error message... which I think is normal...
Failed to access perfctr msr (MSR c0010001 is ffffffffffffffff)
  • You also get errors about not being able to access hardware... obvious why :p ( unless I'm wrong )
  • I haven't installed arch linux in the guest yet ( busy :p ) but will get some time to
  • from what I can see the parameter "nested" is already set to "1" in the "kvm_amd" module when using the "systool" command before applying the "nested" parameter myself
  • I found loading "kvm" or "kvm_amd" loads both
  • you should say "grep svm /proc/cpuinfo" for AMD
  • I have another AMD machine which has "AMD Phenom II x4 955" ( showing the "svm" cpu flag from "/proc/cpuinfo" file which too is using arch linux ( my server ) when I have time... will try it out there
  • I do plan to move to Intel... better drivers... lets get cracking before I move to Intel
  • I'm new to wiki code :p